Good responses to racist stepdad?

My mom and me are Asian (shes filipina I’m mixed) and stepdad is white and he makes racist comments all the time that are “jokes” but not really. Most times I don’t care I’m use to it but I hate it when he says things that are kinda sexual like about Asian hookers or massages and things like that. I’m just wondering if anyone found a good way to respond to little racist comments I can’t just argue or tell him stop he says he’s just joking and I take things too serious, my mom don’t think it’s anything wrong with what he says. So how do I respond to racist jokes or is it better just say nothing?